Computer-Science-A-level-Ocr
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3-3-networks8 主题
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3-2-databases7 主题
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3-1-compression-encryption-and-hashing4 主题
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2-5-object-oriented-languages7 主题
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2-4-types-of-programming-language4 主题
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2-3-software-development5 主题
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2-2-applications-generation6 主题
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2-1-systems-software8 主题
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1-3-input-output-and-storage2 主题
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1-2-types-of-processor3 主题
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1-1-structure-and-function-of-the-processor1 主题
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structuring-your-responses3 主题
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the-exam-papers2 主题
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8-2-algorithms-for-the-main-data-structures4 主题
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8-1-algorithms10 主题
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7-2-computational-methods11 主题
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7-1-programming-techniques14 主题
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capturing-selecting-managing-and-exchanging-data
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entity-relationship-diagrams
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data-normalisation
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relational-databases
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hashing
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symmetric-vs-asymmetric-encryption
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run-length-encoding-and-dictionary-coding
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lossy-and-lossless-compression
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polymorphism-oop
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encapsulation-oop
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inheritance-oop
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attributes-oop
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methods-oop
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objects-oop
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capturing-selecting-managing-and-exchanging-data
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6-5-thinking-concurrently2 主题
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6-4-thinking-logically2 主题
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6-3-thinking-procedurally3 主题
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6-2-thinking-ahead1 主题
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6-1-thinking-abstractly3 主题
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5-2-moral-and-ethical-issues9 主题
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5-1-computing-related-legislation4 主题
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4-3-boolean-algebra5 主题
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4-2-data-structures10 主题
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4-1-data-types9 主题
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3-4-web-technologies16 主题
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environmental-effects
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automated-decision-making
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computers-in-the-workforce
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layout-colour-paradigms-and-character-sets
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piracy-and-offensive-communications
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analysing-personal-information
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monitoring-behaviour
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censorship-and-the-internet
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artificial-intelligence
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the-regulation-of-investigatory-powers-act-2000
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the-copyright-design-and-patents-act-1988
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the-computer-misuse-act-1990
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the-data-protection-act-1998
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adder-circuits
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flip-flop-circuits
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simplifying-boolean-algebra
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environmental-effects
client-server-and-peer-to-peer
Client-Server
What is a client-server network?
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Powerful and reliable ‘server’ computers control the network and ‘serve’ the clients with services such as files, email, web access, etc.
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Clients connect to the servers to access network services
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In this setup, the server hosts, delivers and manages most of the resources and services to be consumed by the clients
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Benefits |
Drawbacks |
|---|---|
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Easier central management |
Single point of failure – if the server goes down, services could be unavailable |
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Scalability: new clients can be added easily |
It can be expensive to set up and maintain – often need dedicated teams of people to maintain them |
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Higher reliability as resources are managed centrally |
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Use case: larger organisations where centralised control is needed, and reliability and security are paramount
Client computers connected to different servers
When to use a client-server network
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The choice between client-server and peer-to-peer depends on the specific needs and resources of the network in question
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Security, cost, ease of setup, and maintenance requirements should be considered
Peer-to-Peer
What is a peer-to-peer network?
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This is the simplest type of network
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In this setup, all computers in the network share equal responsibility, and there is no central server
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All machines have equal status
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Each machine is the responsibility of that machine’s user in terms of security, backup, etc.
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Data is often spread around the network, with each user being responsible for their data
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Benefits |
Drawbacks |
|---|---|
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Easy to set up and less expensive than client-server as no administrative staff are needed |
Lack of central control can lead to security issues and vulnerabilities |
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No dependency on a central server |
Not suitable for large networks as it can have performance issues |
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Data can be shared directly between systems without the need for a central server |
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Use cases: home networks, small businesses, or for specific applications like file sharing
Peer to peer network example setup
Responses